Improper color display in videos

Took me a while to find this place where the problem might be discussed. I never had this problem before, but now, when I stream smth online, or even download it to be played on my pc, I get improper video color. Basically, the video plays, but it looks like you're watching it either through night vision goggles or heat sensor monitor. Basically, the colors are all messed up. I have CCCP installed, and also Xvid codecs as well. What can be the cause of the problem and how deal with it. Thank you!!!

I have installed Winamp, DivX player, Core Medial Player, Windows Media player. It's not just only with the video that is available online, but also sometimes with stuff that I download. For example, when Core medial player played the format correctly before, now it doesn't play it correctly anymore. I also have Xvid codecs and CCCP codecs installed.